void main() {
  var name = 'Voyager I';
  var year = 1977;
  var antennaDiameter = 3.7;
  var flybyObjects = ['Jupiter', 'Saturn', 'Uranus', 'Neptune'];
  var image = {
    'tags': ['saturn'],
    'url': '//path/to/saturn.jpg',
  };

  print('探测器名称: $name');
  print('发射年份: $year');
  print('天线直径: ${antennaDiameter}m');
  print('飞越天体: $flybyObjects');
  print('图片信息: $image');
}
